Carrier 38AUQ- Manual

Carrier 38AUQ

Carrier 38AUQ– Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – INSTALLATION GUIDELINE; Replacement /Retrofit – R22 to Puron
  • Page 7 – INSTALLATION; Fig. 4 — Service Clearance Dimensional Drawing; UNCRATE UNIT —; CONSIDER SYSTEM REQUIREMENTS; RIGGING —; UNIT DAMAGE HAZARD
  • Page 8 – REFRIGERANT LINE SIZING —; Table 3 — Maximum Vertical Separation*
  • Page 10 – Fig. 7 — Typical Piping Connection Assembly; Step 6 — Install Accessories; Field Power Supply —
  • Page 11 – Fig. 8 — Disconnect Switch and Unit; Units Without Factory-Installed Disconnect —; Fig. 9 — Power Wiring Connections; Voltage and Current Balance -; Convenience Outlets; FIRE HAZARD; Units Without Disconnect Option
  • Page 12 – Installing Weatherproof Cover
  • Page 13 – Fig. 12 — Weatherproof Cover Installation; All Units —; Fig. 13 — Typical Remote Thermostat Connections
  • Page 15 – System Check; The crankcase heater must be firmly attached to the com-; Turn On Crankcase Heater; Turn on the crankcase heater for 24 hours before starting the; Preliminary Charge
  • Page 16 – Advanced Scroll Temperature Protection (ASTP); Fig. 14 — Advanced Scroll Temperature; Start Unit
  • Page 19 – OPERATING SEQUENCE; Base Unit Controls —
  • Page 20 – ROUTINE SYSTEM MAINTENANCE; Quarterly Inspection; SERVICE; Refrigeration System
  • Page 21 – Liquid Line Filter Drier; Do not unsweat a filter drier; Field Refrigerant Access Ports; Fig. 20 — CoreMax Access Port Assembly; SEAT
  • Page 22 – Table 12 —38AUQ Defrost Board I/O and Jumper Configurations
  • Page 23 – Fig. 23 — DIP Switch Settings — Defrost Board
  • Page 25 – Fans; LOC
  • Page 28 – Input
  • Page 29 – Table 14 — LED Status Codes
  • Page 30 – Table 15 — CADM Troubleshooting; Lubrication; PERSONAL INJURY AND UNIT DAMAGE
  • Page 31 – FASTENER TORQUE VALUES; Table 16 — Torque Values
  • Page 32 – TROUBLESHOOTING
  • Page 33 – APPENDIX A; AIR CONDITIONER AND HEAT PUMP WITH; warnings; APPENDIX B; WIRING DIAGRAM LIST
  • Page 34 – APPENDIX C; MOTORMASTER SENSOR LOCATIONS; Fig. 31 Motormaster Sensor Locations per Unit Size
  • Page 35 – I. PRELIMINARY INFORMATION; OUTDOOR UNIT
Loading the manual

Installation, Start-Up and

Service Instructions

CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14

Step 1 – Plan for Unit Location . . . . . . . . . . . . . . . . . . . 7
Step 2 – Complete Pre-Installation Checks. . . . . . . . . . 7
Step 3 – Prepare Unit Mounting Support . . . . . . . . . . 7
Step 4 – Rig and Mount the Unit . . . . . . . . . . . . . . . . . . 7
Step 5 – Complete Refrigerant Piping Connections . . . 7
Step 6 – Install Accessories. . . . . . . . . . . . . . . . . . . . . . 10
Step 7 – Complete Electrical Connections . . . . . . . . . 10

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turn On Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . 15
Preliminary Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 -18

38AUQ Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

OPERATING SEQUENCE. . . . . . . . . . . . . . . . . . . . . . . . . . 19

Indoor (Supply) Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cooling Unit Without Economizer . . . . . . . . . . . . . . . . . 19
Cooling, Unit With Economizer . . . . . . . . . . . . . . . . . . . 19
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Supplemental Heating/Emergency Heating . . . . . . . . 19
Defrost Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cooling and Heating Shutdown . . . . . . . . . . . . . . . . . 19

ROUTINE SYSTEM MAINTENANCE. . . . . . . . . . . . . . . 20

Quarterly Inspection (and 30 days after initial start) . . 20

SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 - 31

Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . 20
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Servicing Systems on Roofs with

Synthetic Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . 21
Filed Refrigerant Access Ports . . . . . . . . . . . . . . . . . 21
Outdoor Coil Metering Devices. . . . . . . . . . . . . . . . . 21
Refrigerant System Pressure Access Ports . . . . . . . . 21
Heat Pump Controls. . . . . . . . . . . . . . . . . . . . . . . . . . 22
Commercial Defrost Board . . . . . . . . . . . . . . . . . . . . . . 22
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Compressor Protection. . . . . . . . . . . . . . . . . . . . . . . . . . 22
Low-Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . 33

Comfort Alert Diagnostic Module . . . . . . . . . . . . . . 28
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Outdoor Coil Maintenance and Cleaning

Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Fastener Torque Values . . . . . . . . . . . . . . . . . . . . . . . 31

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
APPENDIX A

Air Conditioner and Heat Pump with Puron

®

–

Quick Reference Guide . . . . . . . . . . . . . . . . . . . . . . . 33

APPENDIX B

Wiring Diagram List . . . . . . . . . . . . . . . . . . . . . . . . . 33

APPENDIX C

Motormaster Sensor Locations . . . . . . . . . . . . . . . . . 34

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . .CL-1, CL-2

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical shock

or other conditions which may cause personal injury or

property damage. Consult a qualified installer, service agency,

or your distributor or branch for information or assistance. The

qualified installer or agency must use factory-authorized kits or

accessories when modifying this product. Refer to the

individual instructions package
Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloths for brazing operations and have a fire

extinguisher available. Read these instructions thoroughly and

follow all warnings or cautions attached to the unit. Consult

local building codes and appropriate national electrical codes

(in USA, ANSI/NFPA70, National Electrical Code (NEC); in

Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the

safety-alert symbol

. When you see this symbol on the unit

and in instructions or manuals, be alert to the potential for

personal injury.
Understand the signal words DANGER, WARNING,

CAUTION, and NOTE. These words are used with the safety-

alert symbol. DANGER identifies the most serious hazards

which

will

result in severe personal injury or death.

WARNING signifies hazards which

could

result in personal

injury or death. CAUTION is used to identify unsafe practices,

which

may

result in minor personal injury or product and

property damage. NOTE is used to highlight suggestions

which

will

result in enhanced installation, reliability, or

operation.

38AUQ

Heat Pump Condensing Units

60 Hz

with Puron

®

(R-410A) Refrigerant

Sizes 07, 08, and 12

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Summary

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Page 7 - INSTALLATION; Fig. 4 — Service Clearance Dimensional Drawing; UNCRATE UNIT —; CONSIDER SYSTEM REQUIREMENTS; RIGGING —; UNIT DAMAGE HAZARD

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